| Code | Name | Region |
|---|---|---|
| GBYET | Chipping Ongar | ESS |
| GBCSO | Chipping Sodbury | SGC |
| GBCPR | Chipping Warden | NTH |
| GBCIK | Chirk | SHR |
| GBCND | Chirnside | SCB |
| GBCIB | Chiselborough | SOM |
| GBCIW | Chiseldon | WIL |
| GBCSL | Chislehurst | BRY |
| GBCHK | Chiswick | HNS |
| GBCH9 | Chittlehampton | DEV |
| GBCHB | Chobham | SRY |
| GBCHL | Cholsey | OXF |
| GBCHR | Chorley | LAN |
| GBCHW | Chorleywood | HRT |
| GBCTU | Christchurch | CAM |
| GBCCH | Christchurch | DOR |
| GBZDD | Chiddingfold | SRY |
| GBCCU | Chiddingstone Causeway | KEN |
| GBCDK | Chideock | DOR |
| GBCDM | Chidham | WSX |
| GBEEE | Chieveley | WBK |
| GBCHI | Chigwell | ESS |
| GBCBN | Chilbolton | HAM |
| GBCOP | Chilcompton | SOM |
| GBCE2 | Childs Ercall | SHR |
| GBXCH | Chilham | KEN |
| GBCII | Chillington | SOM |
| GBCIL | Chilmark | WIL |
| GBCHO | Chilton | DUR |
| GBCWE | Chilwell | NTT |
| GBHIW | Chilworth | HAM |
| GBCIH | Chilworth | SRY |
| GBCNH | Chineham | HAM |
| GBCGF | Chingford | |
| GBCNY | Chinley | DBY |
| GBZAN | Chinnor | OXF |
| GBCSE | Chelsea/london | KEC |
| GBCLT | Cheltenham | GLS |
| GBCHV | Chelveston | NTH |
| GBCWR | Chelworth | WIL |
| GBCHT | Chepstow | MON |
| GBCYH | Cherry Hinton | CAM |
| GBHEY | Chertsey | SRY |
| GBCSH | Chesham | BKM |
| GBCHH | Cheshunt | HRT |
| GBCYA | Cheslyn Hay | STS |
| GBCGS | Chessington | SRY |
| GBCEG | Chester | CHW |
| GBCSR | Chester | CLK |
| GBCES | Chesterfield | DBY |